<template>
  <div class="star" :class="'star-'+size">
    <span class="star-item" v-for="(sc,key) in starClasses" :class="sc" :key="key"></span>
  </div>
</template>

<script>
export default {
    props:{
        score:Number,
        size:Number
    },
    computed:{
        /*
        4.2 4+0+1
        3.5 3+1+1
        2.8 2+1+2
        */ 
        starClasses(){
            // const {score} = this
            let score = 1.6
            const scs = []//最终要返回的数组
            //向scs中添加n个on
            const scoreFloor = Math.floor(score)
            for(let i= 0 ;i<scoreFloor;i++){
                scs.push('on')
            }
            //向scs中添加0/1个half
            if(score*10 - scoreFloor*10 >= 5){
                scs.push('half')
            }
            //向scs中添加n个off
            while(scs.length<5){
                scs.push('off')
            }
            return scs
        }

    },
    created(){
        
    }

};
</script>

<style lang="stylus">
  @import "../../common/stylus/mixins.styl"
.star { // 2x图 3x图
  float: left;
  font-size: 0;

  .star-item {
    display: inline-block;
    background-repeat: no-repeat;
  }

  &.star-48 {
    .star-item {
      width: 20px;
      height: 20px;
      margin-right: 22px;
      background-size: 20px 20px;

      &:last-child {
        margin-right: 0;
      }

      &.on {
        bg-image('./images/star48_on');
      }

      &.half {
        bg-image('./images/star48_half');
      }

      &.off {
        bg-image('./images/star48_off');
      }
    }
  }

  &.star-36 {
    .star-item {
      width: 15px;
      height: 15px;
      margin-right: 6px;
      background-size: 15px 15px;

      &:last-child {
        margin-right: 0;
      }

      &.on {
        bg-image('./images/star36_on');
      }

      &.half {
        bg-image('./images/star36_half');
      }

      &.off {
        bg-image('./images/star36_off');
      }
    }
  }

  &.star-24 {
    .star-item {
      width: 10px;
      height: 10px;
      margin-right: 3px;
      background-size: 10px 10px;

      &:last-child {
        margin-right: 0;
      }

      &.on {
        bg-image('./images/star24_on');
      }

      &.half {
        bg-image('./images/star24_half');
      }

      &.off {
        bg-image('./images/star24_off');
      }
    }
  }
}
</style>